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            <td width="10%" class="headerItem">Current view:</td>
            <td width="10%" class="headerValue"><a href="../index.html" title="Click to go to top-level">top level</a> - <a href="index.html" title="Click to go to directory Pool">Pool</a> - sqlconnpool.h<span style="font-size: 80%;"> (source / <a href="sqlconnpool.h.func-c.html" title="Click to go to function table">functions</a>)</span></td>
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            <td width="5%" class="headerCovTableHead">Coverage</td>
            <td width="5%" class="headerCovTableHead" title="Covered + Uncovered code">Total</td>
            <td width="5%" class="headerCovTableHead" title="Exercised code only">Hit</td>
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            <td class="headerItem">Test:</td>
            <td class="headerValue">覆盖率信息</td>
            <td></td>
            <td class="headerItem">Lines:</td>
            <td class="headerCovTableEntryHi">100.0&nbsp;%</td>
            <td class="headerCovTableEntry">9</td>
            <td class="headerCovTableEntry">9</td>
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            <td class="headerItem">Test Date:</td>
            <td class="headerValue">2024-03-12 16:43:50</td>
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            <td class="headerItem">Functions:</td>
            <td class="headerCovTableEntryHi">100.0&nbsp;%</td>
            <td class="headerCovTableEntry">2</td>
            <td class="headerCovTableEntry">2</td>
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            <td class="headerItem">Legend:</td>
            <td class="headerValueLeg">            Lines:
            <span class="coverLegendCov">hit</span>
            <span class="coverLegendNoCov">not hit</span>
            | Branches:
            <span class="coverLegendCov">+</span> taken
            <span class="coverLegendNoCov">-</span> not taken
            <span class="coverLegendNoCov">#</span> not executed
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            <td></td>
            <td class="headerItem">Branches:</td>
            <td class="headerCovTableEntryLo">50.0&nbsp;%</td>
            <td class="headerCovTableEntry">4</td>
            <td class="headerCovTableEntry">2</td>
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<pre class="sourceHeading">             Branch data     Line data    Source code</pre>
<pre class="source">
<span id="L1"><span class="lineNum">       1</span>                 :             : #ifndef SQLCONNPOOL_H</span>
<span id="L2"><span class="lineNum">       2</span>                 :             : #define SQLCONNPOOL_H</span>
<span id="L3"><span class="lineNum">       3</span>                 :             : </span>
<span id="L4"><span class="lineNum">       4</span>                 :             : #include&lt;mysql/mysql.h&gt;</span>
<span id="L5"><span class="lineNum">       5</span>                 :             : #include&lt;string&gt;</span>
<span id="L6"><span class="lineNum">       6</span>                 :             : #include&lt;queue&gt;</span>
<span id="L7"><span class="lineNum">       7</span>                 :             : #include&lt;mutex&gt;</span>
<span id="L8"><span class="lineNum">       8</span>                 :             : #include&lt;semaphore.h&gt;</span>
<span id="L9"><span class="lineNum">       9</span>                 :             : #include&lt;thread&gt;</span>
<span id="L10"><span class="lineNum">      10</span>                 :             : #include&quot;../Log/log.h&quot;</span>
<span id="L11"><span class="lineNum">      11</span>                 :             : </span>
<span id="L12"><span class="lineNum">      12</span>                 :             : // 创建好一些连接以供备用，防止使用时创建释放消耗资源</span>
<span id="L13"><span class="lineNum">      13</span>                 :             : class SqlConnPool {</span>
<span id="L14"><span class="lineNum">      14</span>                 :             : public:</span>
<span id="L15"><span class="lineNum">      15</span>                 :             :     static SqlConnPool* Instance();</span>
<span id="L16"><span class="lineNum">      16</span>                 :             : </span>
<span id="L17"><span class="lineNum">      17</span>                 :             :     MYSQL* GetConn();</span>
<span id="L18"><span class="lineNum">      18</span>                 :             :     void FreeConn(MYSQL* conn);</span>
<span id="L19"><span class="lineNum">      19</span>                 :             :     int GetFreeConnCount();</span>
<span id="L20"><span class="lineNum">      20</span>                 :             : </span>
<span id="L21"><span class="lineNum">      21</span>                 :             :     void Init(const char* host, int port, const char* user,</span>
<span id="L22"><span class="lineNum">      22</span>                 :             :                 const char* pwd, const char* dbName, int connSize);</span>
<span id="L23"><span class="lineNum">      23</span>                 :             :     void ClosePool();</span>
<span id="L24"><span class="lineNum">      24</span>                 :             : </span>
<span id="L25"><span class="lineNum">      25</span>                 :             : private:</span>
<span id="L26"><span class="lineNum">      26</span>                 :             :     SqlConnPool(); //私有构造</span>
<span id="L27"><span class="lineNum">      27</span>                 :             :     ~SqlConnPool(); //私有析构</span>
<span id="L28"><span class="lineNum">      28</span>                 :             : </span>
<span id="L29"><span class="lineNum">      29</span>                 :             :     int MAX_CONN_;  // 最大的连接数</span>
<span id="L30"><span class="lineNum">      30</span>                 :             :     int useCount_;  // 当前的用户数</span>
<span id="L31"><span class="lineNum">      31</span>                 :             :     int freeCount_; // 空闲的用户数</span>
<span id="L32"><span class="lineNum">      32</span>                 :             : </span>
<span id="L33"><span class="lineNum">      33</span>                 :             :     std::queue&lt;MYSQL*&gt; connQue_;    // 队列MYSQL指针对象</span>
<span id="L34"><span class="lineNum">      34</span>                 :             :     std::mutex mtx_;    // 互斥锁</span>
<span id="L35"><span class="lineNum">      35</span>                 :             :     sem_t semId_;       // 信号量</span>
<span id="L36"><span class="lineNum">      36</span>                 :             : };</span>
<span id="L37"><span class="lineNum">      37</span>                 :             : </span>
<span id="L38"><span class="lineNum">      38</span>                 :             : // RAII实现</span>
<span id="L39"><span class="lineNum">      39</span>                 :             : class SqlConnRAII {</span>
<span id="L40"><span class="lineNum">      40</span>                 :             : public:</span>
<span id="L41"><span class="lineNum">      41</span>                 :<span class="tlaGNC tlaBgGNC">           1 :     SqlConnRAII(MYSQL** sql, SqlConnPool *connpool) {</span></span>
<span id="L42"><span class="lineNum">      42</span>         [<span class="tlaUNC" title="Branch 0 was not taken"> - </span><span class="tlaGBC" title="Branch 1 was taken 1 time"> + </span>]:<span class="tlaGNC">           1 :         assert(connpool);</span></span>
<span id="L43"><span class="lineNum">      43</span>                 :<span class="tlaGNC">           1 :         *sql = connpool-&gt;GetConn();</span></span>
<span id="L44"><span class="lineNum">      44</span>                 :<span class="tlaGNC">           1 :         sql_ = *sql;</span></span>
<span id="L45"><span class="lineNum">      45</span>                 :<span class="tlaGNC">           1 :         connpool_ = connpool;</span></span>
<span id="L46"><span class="lineNum">      46</span>                 :<span class="tlaGNC">           1 :     }</span></span>
<span id="L47"><span class="lineNum">      47</span>                 :             :     </span>
<span id="L48"><span class="lineNum">      48</span>                 :<span class="tlaGNC">           1 :     ~SqlConnRAII() {</span></span>
<span id="L49"><span class="lineNum">      49</span>         [<span class="tlaGBC" title="Branch 0 was taken 1 time"> + </span><span class="tlaUNC" title="Branch 1 was not taken"> - </span>]:<span class="tlaGNC">           1 :         if(sql_) { connpool_-&gt;FreeConn(sql_); }</span></span>
<span id="L50"><span class="lineNum">      50</span>                 :<span class="tlaGNC">           1 :     }</span></span>
<span id="L51"><span class="lineNum">      51</span>                 :             :     </span>
<span id="L52"><span class="lineNum">      52</span>                 :             : private:</span>
<span id="L53"><span class="lineNum">      53</span>                 :             :     MYSQL *sql_;</span>
<span id="L54"><span class="lineNum">      54</span>                 :             :     SqlConnPool* connpool_;</span>
<span id="L55"><span class="lineNum">      55</span>                 :             : };</span>
<span id="L56"><span class="lineNum">      56</span>                 :             : </span>
<span id="L57"><span class="lineNum">      57</span>                 :             : </span>
<span id="L58"><span class="lineNum">      58</span>                 :             : #endif</span>
        </pre>
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